Epitaxial BiFeO3 multiferroic thin film heterostructures

Epitaxial BiFeO3 multiferroic thin film heterostructures

Enhancement of polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3 is reported. Structure analysis indicates that the crystal structure is monoclinic in contrast to bulk, which is rhombohedral. The films display a room-temperature spontan...

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Bibliographic Details
Main Authors: Wang, J., Neaton, J. B., Zheng, H., Nagarajan, V., Ogale, S. B., Liu, B., Viehland, D., Schlom, D. G., Waghmare, U. V., Spaldin, N. A., Rabe, K. M., Wuttig, M., Ramesh, R.
Other Authors: School of Materials Science & Engineering
Format: Journal Article
Language:English
Published: 2011
Subjects:
DRNTU::Engineering::Materials::Microelectronics and semiconductor materials::Thin films
Online Access:https://hdl.handle.net/10356/99744
http://hdl.handle.net/10220/7391
Description
Summary:Enhancement of polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3 is reported. Structure analysis indicates that the crystal structure is monoclinic in contrast to bulk, which is rhombohedral. The films display a room-temperature spontaneous polarization (50-60μC/cm2) almost an order of magnitude higher than that of the bulk (6.1μC/cm2). The observed enhancement is corroborated by first-principles calculations and found to originate from large relative displacements of the Bi, Fe, and O sublattices. The films also exhibit enhanced thickness-dependent magnetism compared with the bulk. These enhanced and combined functional responses in thin film form present an exciting opportunity to create and implement novel thin film devices that actively couple the magnetic and ferroelectric order parameters.

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